Therapeutic Foam Mixing Device with Porous Mesh Screen

The device is divided into separate functional modules: a syringe for storing and pushing the foamable therapeutic, a mixing device with distinct channels (supply channel from syringe, mixing channel through mesh, delivery channel to patient), and a three-way valve for controlling flow paths. This segmentation allows each component to perform its specific function efficiently while keeping the overall system manageable and not overly complex.

A mesh screen or sintered material is introduced as an intermediary element in the mixing channel. This intermediary component facilitates efficient mixing of the foamable therapeutic with gas (air or medical gas) to create stable foam, while requiring minimal device complexity. The mesh acts as a passive mixing element that leverages fluid dynamics rather than requiring complex active mixing mechanisms.

The foamable therapeutic is prepared and loaded into the syringe in advance, but the actual foam generation is deferred until the moment of use. The syringe is equipped with a mixing device that combines the foamable therapeutic with gas only when needed, ensuring maximum freshness and effectiveness. This preliminary preparation of components rather than the final product resolves the contradiction between availability and freshness.

The device enables on-demand parameter changes in the therapeutic formulation by controlling the mixing ratio and foam stability through the mesh screen characteristics. The foam characteristics (bubble size, stability, density) can be adjusted by selecting appropriate mesh parameters, allowing optimization for specific clinical applications while maintaining freshness through immediate preparation.

A mesh screen or sintered material is employed in the mixing channel to control bubble size and foam quality. The porous structure of the mesh (with controlled pore sizes) directly influences the foam characteristics, enabling precise control over bubble diameter and distribution. This approach achieves high manufacturing precision through a relatively simple passive mixing mechanism rather than complex active systems.

The mesh screen parameters (pore size, mesh density, material properties) can be adjusted to optimize foam quality for different applications. By changing these physical parameters of the mixing element, precise control over bubble size and foam stability is achieved without requiring complex mechanical or electronic control systems, thus maintaining device simplicity while ensuring high precision.

The foam generation process maintains continuous useful action through the three-way valve system that can rapidly switch between different flow paths. The mesh screen continuously mixes the foamable therapeutic with gas as it passes through, ensuring complete mixing and consistent foam quality even during rapid generation. The continuous flow through the porous mesh ensures uniform foam characteristics without interruption.

The device utilizes pneumatic principles by introducing gas (air or medical gas) through the mesh screen into the foamable therapeutic liquid, creating foam through gas dissolution and bubble formation. This pneumatic mechanism enables rapid foam generation while maintaining mixing completeness, as the gas-liquid interaction through the porous mesh is inherently efficient and continuous, producing consistent foam quality at high speeds.